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neonofarm [45]
3 years ago
6

Evaluate Vb2 - 4ac when a = -2, b = 8 and c = 1/2 Write your answer in simplest form and in decimal form rounded to the

Mathematics
1 answer:
lubasha [3.4K]3 years ago
5 0
Nauru jejejeje r rhrhhr ejejejr rjrjrjr th
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Can someone give me the answers and step by step instructions please??
professor190 [17]

Answer:

-1,4,-7,10,...  neither

192,24,3,\frac{3}{8},...  geometric progression

-25,-18,-11,-4,...  arithmetic progression

Step-by-step explanation:

Given:

sequences: -1,4,-7,10,...

192,24,3,\frac{3}{8},...

-25,-18,-11,-4,...

To find: which of the given sequence forms arithmetic progression, geometric progression or neither of them

Solution:

A sequence forms an arithmetic progression if difference between terms remain same.

A sequence forms a geometric progression if ratio of the consecutive terms is same.

For -1,4,-7,10,...:

4-(-1)=5\\-7-4=-11\\10-(-7)=17\\So,\,\,4-(-1)\neq -7-4\neq 10-(-7)

Hence,the given sequence does not form an arithmetic progression.

\frac{4}{-1}=-4\\\frac{-7}{4}=\frac{-7}{4}\\\frac{10}{-7}=\frac{-10}{7}\\So,\,\,\frac{4}{-1}\neq \frac{-7}{4}\neq \frac{10}{-7}

Hence,the given sequence does not form a geometric progression.

So, -1,4,-7,10,... is neither an arithmetic progression nor a geometric progression.

For  192,24,3,\frac{3}{8},... :

\frac{24}{192}=\frac{1}{8}\\\frac{3}{24}=\frac{1}{8}\\\frac{\frac{3}{8}}{3}=\frac{1}{8}\\So,\,\,\frac{24}{192}=\frac{3}{24}=\frac{\frac{3}{8}}{3}

As ratio of the consecutive terms is same, the sequence forms a geometric progression.

For -25,-18,-11,-4,... :

-18-(-25)=-18+25=7\\-11-(-18)=-11+18=7\\-4-(-11)=-4+11=7\\So,\,\,-18-(-25)=-11-(-18)=-4-(-11)

As the difference between the consecutive terms is the same, the sequence forms an arithmetic progression.

3 0
3 years ago
PLS HELP ASAP ILL GIVE BRAINLKEST THANKS 10 POINTS
KATRIN_1 [288]

1st question

Answer: y = 200x

y = 400

x = 2

400 = 200*2

2nd question

Answer: y = 2x

y = 6

x = 3

6 = 2*3

8 0
2 years ago
Find the product please and thank you
crimeas [40]
You would multiply the power by the powers of both exponents
2 × 3 = 6 so a^6
3 × 4 = 12 so b^12
Answer is
a^6b^12
4 0
3 years ago
Solve the following system equation graphically on the set of axes below y= x+4 and y= -3/2 - 1 PLEASE HELP MEEE
gizmo_the_mogwai [7]

Answer:

y=4

y= -1

Step-by-step explanation:

8 0
3 years ago
What is the cosine of angle a?<br> a. 8/17<br> b. 15/8<br> c. 15/17<br> d. 8/15
jolli1 [7]
Check the picture below.

6 0
3 years ago
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